Julie invested in four (4) S&P 500 index futures contracts at a price of 2392. The contract size is $250 times the index value and the risk-free interest rate is 2.5%. The futures are maturing today at a price of 2387.50. What is the amount of her profit or loss? Then, Julie's sister shorts 6 S&P 500 index contracts for delivery in 90 days with a $250 multiplier and a 1.75% risk-free rate at the current price is 2414.87. At maturity of the contracts are selling for 2571.23 and the risk-free rate fell to 1.24%, what is the profit or loss to Julie's sister?